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Volume 30Issue 4
Dec. 2021
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Jianfeng Li, Xiong Xu, Ping Li, Yawei Tang. DOA Estimation Based on Subspace Compensation for Unfolded Coprime Array[J]. JOURNAL OF BEIJING INSTITUTE OF TECHNOLOGY, 2021, 30(4): 363-367. doi: 10.15918/j.jbit1004-0579.2021.060
Citation: Jianfeng Li, Xiong Xu, Ping Li, Yawei Tang. DOA Estimation Based on Subspace Compensation for Unfolded Coprime Array[J].JOURNAL OF BEIJING INSTITUTE OF TECHNOLOGY, 2021, 30(4): 363-367.doi:10.15918/j.jbit1004-0579.2021.060

DOA Estimation Based on Subspace Compensation for Unfolded Coprime Array

doi:10.15918/j.jbit1004-0579.2021.060
Funds:This work is supported by the Fund of State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System (CEMEE 2021Z0101B); the National Natural Science Foundation of China (No.61601167).
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  • Author Bio:

    Jianfeng Li(M’18) received B.S. degree of electronic information science and technology and Ph.D. degree of communication and information systems from Nanjing University of Aeronautics and Astronautics (NUAA) in 2010 and 2015, respectively. Now he is an associate professor in College of Electronic and Information Engineering, NUAA. His research interests include array signal processing and signal localization

    Xiong Xureceived the B.S. degree in electronic information science and technology and the Ph.D degree in physical electronics from University of Electronic Science and Technology of China,Chengdu, in 2006 and 2012, respectively. Now, as an associate research fellow with the CEMEE Laboratory, his research interests include data processing and machine learning

    Ping Lireceived the B.S. degrees in electronic information engineering from Hohai University in 2019. Currently he is studying toward the M.S. degree in Nanjing University of Aeronautics and Astronautics (NUAA). His research interests include array signal processing

    Yawei Tangreceived the B.S. degree from Nanjing University of Aeronautics and Astronautics (NUAA) in 2019. Now he is studying toward the M.S. degree in NUAA. His research interests include array signal processing

  • Corresponding author:Email: lijianfeng@nuaa.edu.cn
  • Received Date:2021-08-22
  • Rev Recd Date:2021-09-22
  • Accepted Date:2021-10-20
  • Available Online:2021-12-25
  • Publish Date:2021-12-27
  • Direction of arrival (DOA) estimation for unfolded coprime array (UFCA) is discussed, and a method based on subspace compensation is proposed. Conventional DOA estimation methods partition the UFCA into two subarrays for separate estimations, which are then combined for unique DOA determination. However, the DOA estimation performance loss is caused as only the partial array aperture is exploited. We use the estimations from one subarray as initial estimations, and then enhance the estimation results via a compensation based on the whole array, which is implemented via a simple least squares (LS) operation constructed from the initial estimation and first-order Taylor expansion. Compared to conventional methods, the DOA estimation performance is improved while the computational complexity is in the same level. Multiple simulations are conducted to verify the efficiency of the proposed approach.
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